Proactive Filter, Coil & HVAC Maintenance

glen w filtersG&B Environmental is one of few certified filter specialists in the state of Minnesota. Our filter certification means we have demonstrated a thorough, up-to-date understanding of air filtration technology and high level of professionalism. In order to become certified, air filtration professionals must pass an extensive examination on the principles, methods and applications of air filtration.

On Time, Every Time

Customer service is our top priority. We focus on providing each customer with a custom solution that will save money, conserve energy and minimize risk and headaches. Our initial costs may not be the rock bottom option, but we are confident that we will be your best filtration, coil and duct option in the long run. We recognize that our job is more than replacing or maintaining filters, you count on us to make decisions that help your heating, cooling, water and HVAC systems running. Compliance with the NAFA Code of Ethics ensure that we will do our best for you every time.

G & B Environmental Specialties:

Improving Consumer Education on Filters, Coils, Ducts and HVAC Systems

We are working on a series of short lessons to help our customers better understand filters, coils, ducts, HVAC systems and the advantages of regular maintenance. Check them out below – sign up for updates at the right.

We take pride in our work and we figure the more you know the better we look!

Don’t let the snow hold you back, Spring will be here before you know it.

G&B Environmental continues to install cottonwood protection screens, even when the only thing on our minds is snow. To refresh your memory, here is the Wikipedia definition of snow.

Snow refers to forms of ice crystals that precipitate from the atmosphere (usually from clouds) and undergo changes on the Earth’s surface.[2] It pertains to frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place, and ultimately melt, slide or sublimate away. Snowstorms organize and develop by feeding on sources of atmospheric moisture and cold air. Snowflakes nucleate around particles in the atmosphere by attracting super cooled water droplets, which freeze in hexagonal-shaped crystals. Snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and rime. As snow accumulates into a snowpack, it may blow into drifts. Over time, accumulated snow metamorphoses, by sintering, sublimation and freeze-thaw. Where the climate is cold enough for year-to-year accumulation, a glacier may form. Otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater.

Major snow-prone areas include the polar regions, the upper half of the Northern Hemisphere and mountainous regions worldwide with sufficient moisture and cold temperatures. In the Southern Hemisphere, snow is confined primarily to mountainous areas, apart from Antarctica.[3]

Trane unit cottonwood screen installation.

RTU Hail Guard Protection

Trane unit cottonwood screen installation.

Understanding How Hail Damage Affects Commercial HVAC Units











–Hail damages a condenser coil when it impacts and bends the fins which prevents the appropriate airflow across the coil and inhibits cooling of the refrigerant.

–If the refrigerant is not cooled the system can overheat reducing the life of the unit. Coils are designed with extra capacity to allow for some reduction in airflow due to debris in the coils or minor bending of the fins, but proper practices to maintain unobstructed coils is important for extending the life of the unit.

–When a condenser unit is damaged by hail, it can often be restored to its pre-loss condition by “combing” the fins with a special tool. A fin comb has thin plastic or metal teeth that fit between the aluminum fins of the condenser coil. Because the fins are thin and malleable, a technician can straighten them by pulling a comb along the coil.

–This is typically a far more cost-effective method to restore the efficiency of the condenser.  If the deformation of the fins is too extensive, or if large hailstones have caused damage to the copper tubing itself, then it may be necessary to replace the coil.  The cost advantage of combing out the hail damage can be substantial in many cases. Combing involves a few hours of labor, and does not require the purchase of any materials; replacing a coil or an entire condenser unit requires installation labor, thousands of dollars worth of materials, and even crane rental fees for rooftop units.

Combing is the most efficient way to repair coils and by far the most common repair method recommended by G&B Environmental technicians. About 85% of G&B Environmental hail studies recommend repairing the unit by combing the coil. To comb a coil, a plastic or light gauge metal comb or a precision blade is inserted between the fins and pulled down to straighten them and allow the appropriate airflow to cross the coil. This is a tedious process and can take a contractor from two to four hours to perform at an hourly rate of $150 per hour, but $300 to $600 is much more reasonable than the cost to replace a coil ($3,000 to $5,000) or replace the RTU ($10,000 to $20,000).

G&B ENVIRONMENTAL, INC. 1-800-466-2018

Spring is right around the corner. It’s time to call your favorite specialized cleaning company 1800-466-2018

The US Department of Energy states that a dirty condenser coil can increase compressor energy consumption by up to 30% percent! Cleaning your coils will improve your operating efficiency, with lowering your energy costs and improving indoor air quality. Dirty coils will cause your compressor to run longer and work harder than necessary, which may shorten the life of your HVAC equipment. Not only is this a way to save money, but studies show that employees working in an environment with improved indoor air quality are more productive. G&B strongly encourages our customers to consider adding coil cleaning to their maintenance programs.  Once coils are clean consider adding Permatron prevent screens to the equipment to make the cleaning last longer for added benefits.  Call G&B today to schedule your Spring cleaning.



Sanuvox Technologies Inc. is a global leader in ultraviolet air treatment providing the most advanced cost-effective In-

Duct & Stand-Alone UV Air and Coil Sterilization Systems available. Proprietary Sanuvox UV Systems are designed to

maximize exposure time delivering the Ultraviolet energy required to deliver exceptionally high airborne disinfection rates.

TESTED & PUBLISHED RESULTS.   Call G&B Environmental, Inc today to find out how we can provide unsurpassed protection for your air and water applications.


Air-Cooled Condensers need plenty of protection without reducing airflow.

RETROFIT Screens and hail guards provide excellent protection without reducing air flow.  While some hail guards are installed as part of a new equipment system, sometimes the hail guard is an optional feature that may be purchased at a later date for easy installation.  Our company makes site visits to confirm the custom fit, than provides turnkey service to make sure the project is completed in a timely fashion.  Call today to receive cost-effective proposal to protect your investments.

HVAC Durable Protective Screens–Aside from proper filtration, the best filters require the least maintenance and use the least energy, satisfying cost efficiency.

Building trust and learning as we go thru this process of completing multiple projects for our clients creates a since of pride and accomplishment at G&B Environmental, Inc.  Please call our number today to find out how we can protect your sensitive cooling equipment and provide you with peace of mind.   1-800-466-2018

Dry Coolers

York Chiller

Cooling Tower

Cooling Towers

Money-Saving Products

Hail guard packages are designed to protect the unit condenser coil from hail and general contact damage. Excessive damage to unit outdoor coils can result in diminished performance due to reduced air flow over the heat transfer surfaces.  G&B Environmental, Inc. would be more than happy to come to your location and custom install product that works to protect your investment.

Special custom size protection screen

3 inch U channel with screen to protect coil

New Condenser


Do the Math (Clean HVAC coils save you money)

To minimize energy usage and reduce utility costs, the A/C coils should be cleaned at least once a year. It is estimated that dirty evaporator and condenser coils can increase the energy usage of your air conditioning system by over 30 percent.

We clean coils correctly, resulting in our customers saving a great deal of money in utilities and even more money in maintenance costs.

Stressed coils are bad for the environment and HVAC equipment – Protect with G&B Environmental, Inc.

An HVAC condenser is not a cheap piece of equipment, It’s time to protect with G&B Environmental custom designed hail / cottonwood protection screens made specifically for your sensitive placed HVAC system.   Call 1-800-466-2018

Water Treatment For Commercial Kitchens

The Systems IV Model TFH410 provides superior water filtration for lead reduction. The TFH410 is a powerful, multifunctional water treatment system for commercial applications.

DETAILS:  Industry leader lead reduction system.  To purchase call 1-800-466-2018 Mon-Fri 8am-5pm CEN.


  • .5 Micron Nominal Filtration.
  • Provides continuous protection for 20,000 gal. Chlorine, Taste, Odor. Lead Reduction 8,000 gal @ 2.5 GPM.
  • Reduces Cysts, Cryptosporidium, Entamoeba and Toxoplasma.
  • Eliminate lead issues in food service kitchen cooking equipment.
  • Lead Reduction Based on NSF/ANSI Standard 53.

Made in USA.